Oracle released VirtualBox 4.0.10, a maintenance release of VirtualBox 4.0. It comes to fix many bugs like proper device detection on RHEL/OEL/CentOS 5 guests, fixed disappearing settings widgets on KDE hosts, VT-x detection on Linux 3.0 hosts and fixed a memory leak during VBoxManage guestcontrol execute, for more about this release please check the changelog.